When the temperature drops, there’s just nothing better than the cozy embrace of a spa to warm you up. Whether wading into thermal waters or reclining for a beautiful treatment, even an hour of bliss can transport you far from the harsh challenges of winter. Here are six of the best spas in the United States—places that provide pleasure, whether you’re going to stay an hour, a couple days—or decide you never want to leave.
Subterranean Wonder
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